Abstract
Products of the gas-phase reactions of OH radicals (in the presence of NO) and O 3 with the biogenic emission cis-3-hexen-1-ol have been investigated using gas chromatography with flame ionization detection (GC-FID), combined gas chromatography-mass spectrometry (GC-MS), gas chromatography with Fourier transform infrared spectroscopy (GC-FTIR), and direct air sampling, atmospheric pressure ionization tandem mass spectrometry (API-MS). Propanal and 3-hydroxypropanal were identified and quantified from the OH radical and O 3 radical reactions, with respective formation yields of 0.746 ± 0.067 and 0.48 −0.24 +0.48 from the OH radical reaction and 0.493 ± 0.075 and 0.33 −0.16 +0.33 from the O 3 reaction. In addition, a hydroxynitrate of molecular weight 179 [CH 3CH 2CH(OH)CH(ONO 2)CH 2CH 2OH and/or CH 3CH 2CH(ONO 2)CH(OH)CH 2CH 2OH] and a hydroxycarbonyl of molecular weight 132, expected to be CH 3CH 2CH(OH)CH(OH)CH 2CHO, were observed from the OH radical reaction by API-MS analyses. The reaction mechanisms are discussed.
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